pdns/dynmessenger.hh

   1 /*
   2  * This file is part of PowerDNS or dnsdist.
   3  * Copyright -- PowerDNS.COM B.V. and its contributors
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * In addition, for the avoidance of any doubt, permission is granted to
  10  * link this program with OpenSSL and to (re)distribute the binaries
  11  * produced as the result of such linking.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22 #pragma once
  23 #include <string>
  24 #include <sys/types.h>
  25 #include <sys/socket.h>
  26 #include <netinet/in.h>
  27 #include <sys/un.h>
  28 #include <unistd.h>
  29 #include <libgen.h>
  30 #include <errno.h>
  31 #include "iputils.hh"
  32 #include "pdnsexception.hh"
  33
  34 #include "namespaces.hh"
  35
  36 //! The DynMessenger can send messages to UNIX domain sockets and TCP sockets
  37 class DynMessenger
  38 {
  39   int d_s;
  40
  41   struct sockaddr_un d_remote; // our remote address
  42
  43   DynMessenger(const DynMessenger &); // NOT IMPLEMENTED
  44
  45 public:
  46   // CREATORS
  47
  48   DynMessenger(const string &filename,
  49     int timeout_sec = 7,
  50     int timeout_usec = 0);  //!< Create a DynMessenger sending to this file
  51
  52   DynMessenger(const ComboAddress& remote,
  53     const string &password,
  54     int timeout_sec = 7,
  55     int timeout_usec = 0);  //!< Create a DynMessenger sending to this file
  56
  57   ~DynMessenger();
  58
  59   // ACCESSORS
  60   int send(const string &message) const; //!< Send a message to a DynListener
  61   string receive() const; //!< receive an answer from a DynListener
  62 };